white dots????

i have like two white dots on one of my fan leaves...the dots are very little though....i think i my have my light too close, causing it too burn...what im i doing wrong?????

Powdery Mold, look in the GrowFAQ for everything you need to know.

W33D said:

Powdery Mold, look in the GrowFAQ for everything you need to know.

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Is that what it is???? i tryed rubbing it off and if wont come off......woulding powdery mold rub off?????